UI - Updated Stylet

Keyframes - Finished copy/paste implementation

src/Artemis.Core/Models/Profile/LayerProperties/ILayerProperty.cs

@@ -16,10 +16,15 @@ namespace Artemis.Core
         /// <summary>
         ///     Gets the description attribute applied to this property
         /// </summary>
-        public PropertyDescriptionAttribute PropertyDescription { get; }
+        PropertyDescriptionAttribute PropertyDescription { get; }
 
         /// <summary>
-        /// Gets the unique path of the property on the layer
+        ///     The parent group of this layer property, set after construction
+        /// </summary>
+        LayerPropertyGroup LayerPropertyGroup { get; }
+
+        /// <summary>
+        ///     Gets the unique path of the property on the layer
         /// </summary>
         public string Path { get; }
 
@@ -30,7 +35,7 @@ namespace Artemis.Core
         ///         <see cref="LayerProperty{T}" />
         ///     </para>
         /// </summary>
-        void Initialize(RenderProfileElement profileElement, LayerPropertyGroup @group, PropertyEntity entity, bool fromStorage, PropertyDescriptionAttribute description, string path);
+        void Initialize(RenderProfileElement profileElement, LayerPropertyGroup group, PropertyEntity entity, bool fromStorage, PropertyDescriptionAttribute description, string path);
 
         /// <summary>
         ///     Returns a list off all data binding registrations
@@ -38,7 +43,14 @@ namespace Artemis.Core
         List<IDataBindingRegistration> GetAllDataBindingRegistrations();
 
         /// <summary>
-        /// Updates the layer properties internal state
+        ///     Attempts to load and add the provided keyframe entity to the layer property
+        /// </summary>
+        /// <param name="keyframeEntity">The entity representing the keyframe to add</param>
+        /// <returns>If succeeded the resulting keyframe, otherwise <see langword="null" /></returns>
+        ILayerPropertyKeyframe? AddKeyframeEntity(KeyframeEntity keyframeEntity);
+
+        /// <summary>
+        ///     Updates the layer properties internal state
         /// </summary>
         /// <param name="timeline">The timeline to apply to the property</param>
         void Update(Timeline timeline);

src/Artemis.Core/Models/Profile/LayerProperties/LayerProperty.cs

@@ -118,9 +118,7 @@ namespace Artemis.Core
         /// </summary>
         public RenderProfileElement ProfileElement { get; internal set; }
 
-        /// <summary>
-        ///     The parent group of this layer property, set after construction
-        /// </summary>
+        /// <inheritdoc />
         public LayerPropertyGroup LayerPropertyGroup { get; internal set; }
 
         #endregion
@@ -282,6 +280,22 @@ namespace Artemis.Core
             OnKeyframeAdded();
         }
 
+        /// <inheritdoc />
+        public ILayerPropertyKeyframe? AddKeyframeEntity(KeyframeEntity keyframeEntity)
+        {
+            if (keyframeEntity.Position > ProfileElement.Timeline.Length)
+                return null;
+            T value = CoreJson.DeserializeObject<T>(keyframeEntity.Value);
+            if (value == null) 
+                return null;
+          
+            LayerPropertyKeyframe<T> keyframe = new LayerPropertyKeyframe<T>(
+                CoreJson.DeserializeObject<T>(keyframeEntity.Value)!, keyframeEntity.Position, (Easings.Functions) keyframeEntity.EasingFunction, this
+            );
+            AddKeyframe(keyframe);
+            return keyframe;
+        }
+
         /// <summary>
         ///     Removes a keyframe from the layer property
         /// </summary>
@@ -508,6 +522,7 @@ namespace Artemis.Core
             if (!IsLoadedFromStorage)
                 ApplyDefaultValue(null);
             else
+            {
                 try
                 {
                     if (Entity.Value != null)
@@ -517,6 +532,7 @@ namespace Artemis.Core
                 {
                     // ignored for now
                 }
+            }
 
             CurrentValue = BaseValue;
             KeyframesEnabled = Entity.KeyframesEnabled;
@@ -524,12 +540,8 @@ namespace Artemis.Core
             _keyframes.Clear();
             try
             {
-                _keyframes.AddRange(Entity.KeyframeEntities
-                    .Where(k => k.Position <= ProfileElement.Timeline.Length)
-                    .Select(k => new LayerPropertyKeyframe<T>(
-                        CoreJson.DeserializeObject<T>(k.Value)!, k.Position, (Easings.Functions) k.EasingFunction, this
-                    ))
-                );
+                foreach (KeyframeEntity keyframeEntity in Entity.KeyframeEntities.Where(k => k.Position <= ProfileElement.Timeline.Length)) 
+                    AddKeyframeEntity(keyframeEntity);
             }
             catch (JsonException)
             {